Q: Question:
Does CICS/6000 use or support the use of TCP/IP sockets? If
so, where can I get more information on how this is
implemented?
---------- ---------- ---------- --------- ---------- ----------
R: Response:
CICS/6000 both uses TCP/IP sockets internally for its own
distributed operation and permits CICS applications to be
created which are sockets applications themselves.
CICS/6000 uses the DCE RPC to facilitate communication from
the region to a number of its components including:
o cicsterm/cicsteld - 3270 clients
o Encina SFS - File manager
o PPC Gateway - Connectivity over SNA
DCE itself uses TCP/IP as the transport protocol for the
RPC.
From a programming perspective, a CICS/6000 application
written in the C programming language may include calls to
any of the AIX sockets API functions and system calls.
These calls will allow the program to set itself up as a
socket server, make a call to a socket server and pass
information in-between. There are few restrictions on the
use and types of socket calls allowable:
o The socket must be terminated at the end of the program. This
can be achieved with close() system call.
o All programming must adhere to the thread safe programming
guidelines mandated by the DCE pthreads library. Specially:
- No process-blocking calls
- No use of fork(), exec(), sleep()
- Use the "_r" versions of functions where applicable. ie.
gethostbyname_r() instead of gethostbyname()
When compiling a CICS application which includes sockets
calls, compile with the extra flag "-D_ALL_SOURCE" otherwise
compilation errors will be produced.
The use of sockets with CICS/6000 is not currently
documented in any IBM manuals.
---------- ---------- ---------- --------- ---------- ----------
*====================================================*
| This entry has been edited for Library/INFO status.|
*====================================================*
NK ( upgrader: D73FA09
---------- ---------- ---------- --------- ---------- ----------
This item was created from library item Q676949 FFMRH
Additional search words:
CICS CICS6000 DASYS FFMRH IOSC IOSCKIX6 JAN95 NK OZNEW SOCKETS
SUPPORT SUPPORTED TRADE WORLD 6000
WWQA: ITEM: RTA000053238 ITEM: RTA000053238
Dated: 11/1996 Category: KIX6000
This HTML file was generated 99/06/24~12:43:21
Comments or suggestions?
Contact us